Expansion-plug.



W. -S'. BARLOW.

EXPANSION PLUG.

APPLICATION FILED JLLNE 21. 1911.

Patented May 21, l918.

WALTER S. BARLOVJ, OF MARYSVILLE, TEXAS.

EXPANSION-PLUG.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed June 27, 1917. Serial No. 177,290.

To all whom it may concern:

Be it known that I, WALTER S. BARLOW, a citizen of the United States,residing at Marysville, R. F. D. No. 2, in the county of Cooke and Stateof Texas, have invented a new and useful Expansion-Plug, of which thefollowing is a specification.

The subject of this invention is an expansion plug wherein a travelingnut cooperates with a screw to expand or contract a sectional plug, andthe objects of the invention are to provide means for guiding andcentering the plug when the same is being inserted in a pipe; to providean adjustable plug member, with screw operated means for actuating thesame; to provide means for utilizing the plug as a pipe withdrawingimplement; and to provide a plug structure of simple formation which maybe readily assembled and easily and rapidly operated.

WVith these and such other objects in view as may hereinafter more fullyappear, my invention consists in the novel arrangement and constructionof parts set forth in the following description, more particularlypointed out in the claims, and a practical and preferred form of whichis shown in the accompanying drawing, Wherein:-

Figure 1 is a central longitudinal sectional view of the plug.

Fig. 2 is a cross section taken on the lin 22, Fig. 1.

Fig. 3 is a cross section taken on the line 3-3, Fig. 1, the operativeparts being re moved.

Referring to the drawing by numerals Conical members 1 and 2, placedbase to base, form the casing of the device. Extending forwardly fromthe cone 1 is a guide rod 3, having lateral ears 4:, to which arepivotally secured guide arms 5--5, held in their expanded position bycompression springs 66. A cross wall 7 is provided in the cone 1, and isbored and tapped to receive the threaded ends of a series of rods 88,which are adapted to bores in the apex of the cone 2 and by which thecones are secured together.

\Vithin the cone 2, and having its inner end suitably journaled in thecross wall 7,

and its outer end extending without the apex of the cone 2, is athreaded rod 9, provided with a collar 10, by which the rod is held inplace, and upon the rod 9 travels a nut 11, from which extend thelaterally disposed lugs 12, to each of which is pivotally secured a link13, the other end of which has pivotal engagement with an car 14, formedon a plate 15, which forms a section of the expansion member.

The plates 15 are arranged to slide between the bases of the cones 1 and2, and the are formed edge of every other plate is beveled in anopposite direction, as seen at 16 and 16, Fig. 1, while the adjacentedges of the plates overlap, thereby assuring a continuous and unbrokenplug when the plates are expanded within a pipe.

The apex of the cone 2 may be reduced and threaded as seen most clearlyat 17, Fig. 1, so as to permit attachment thereto when it is desired touse the implement for the purpose of withdrawing a pipe from a well,

or forcing the plug into a pipe against pressure.

Dowel pins 8 may be provided at diametrically opposite points of theconical member 1, which project into grooves formed in the underlyingplates 15. These keep the cones-and plates in proper position withrespect to each other.

In practice the device is used as follows: A crank not' shown may engagethe squared end of rod 9 and by revolving the shaft clockwise the nut 11is caused to travel toward the apex of the conical casing 2. This will,through the links 13, draw the plates 15 toward a common centercoincident with the axis of the rod 9 and cause the plates to be housedwithin the casing W hen a pipe is to be plugged, a section of pipe isthreaded onto the end 17, r a rcducing joint may be threaded thereon andthe pipe secured to the reducing joint. The plug is then forced into thepipe which is to be plugged, the section of pipe being used as a handleduring this operation. A crank is attached to the rod 9, which rodextends through the attached pipe, and the plug expanded.

If great pressure is to be overcome in forcing the plug into the pipe, ayoke may be placed around the handle contiguous the reducing joint, anda block and tackle made use of to force the plug into the pipe.

In withdrawing piping from a well or the like, a pipe or sections ofpipe sufiicient to stand the strain are threaded onto the end 17 theplug inserted, the plates 15 expanded, and the whole withdrawn by anysuitable and convenient lifting force,

Having described my invention, what I claim as new and desire to secureby Letters Patent is 1. In an expansion plug, a casing comprisingconical members arranged base to base, an expanding member comprisingsec tions slidably mounted between the conical members, and screwoperated means for sliding said sections.

2. In anaexpansion plug, a casing com prising sections, meansforsecuringthe sections together, plates, between the sections and arrangedto slide radially, and means for sliding the plates.

3.111 an ex )ansion )lll a casin a threaded rod revoluble within thecasing, a nut traveling on the rod, plates in the casing, and meansconnecting the plates to the nut.

4. In an expansion plug, a casing, a threaded rod turning in the casing,anut traveling on the rod, plates in the casing and sliding transverselythereof, and links connecting the plates to the traveling nut.

5. An expansion plug, comprising a sectional casing, means for securingthe sections of the casing together, overlapping plates slidably mountedbetween the sections, and means for sliding the plates.

6. An expansion plug, comprising a casing composed of sections, meansfor securing the sections together, overlapping plates between thesections and arranged to slide radially, and screw operated means forsli d ing' the plates.

7. An expansion plug, comprising a casing composed of Sections, meansfor binding the sections together, plates sliding between the sections,a threaded rod revolubl'ewithin the casing, a nut traveling on the rod,and means connecting the plates to the nut to reciprocate the plates toexpand and contract the plug.

S. An expanding plug, comprising a casing composed of secti0ns,meansforbinding the sections together, plates in the casing and slidingtransversely thereof, a threaded rod turning in the casing, a nuttraveling on the rod, and, links connecting the plates to the travelingnut.

In testimony that Iclaim the foregoing as my own, I have hereto atfixedmy signatu-re inthepresence of two witnesses.

I WVALTER' S. B'ABLOVV. Witnesses:

J. F. FL TCHER, W. J. Dawson.

Copies of this patent may be obtained. for five cents each, by,addressing the Gommissioner of Patents,

Washington, I). C.

